Fbedekik nielsen



i UNITED STATES PATENT oEEioE.

FREDERIK NIELSEN, OF BOSTON, MASSACHUSETTS, ASSIGNOR. BY DIRECT AND MESNE ASSIGNMENTS, T A. SCHRADERS SON, INCORPORATED, OF BROOKLYN, NEW YORK.

A CORPORATION OF NEW YORK.

INFLATING-VALVE.

Specification of Letters Patent.

Application tiled July 8, 1913, Serial Ho. 777,841. Renewed August 1. 1918. Serial No. 247.870.

l'n all whom it may concern:

Be it known that l, Fniznsmir NisLsEN, a subject of the King of Denmark, and resident of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new. and useful Improvements in .In- {latine-Valves, of which the following is a speci ication.

'l` his invention relates to intlating valves und embodies some of the principles embodied in the valve set forth in my copending application Serial No7 729,055 now Patent M. 1,082,232, dated-December 23,1913. In the present invention, and likewise in thatet forth in said copending application, the device comprises a check valve which is operative during inflation and a main valvecarried by n screw-cap, the main valve beingnforced against a valve seat when the screw-cap is screwed on, whereby the longitudinal movement of the main valve unseats the check valve. The two valves are caused to coact in this manner for the purpose of deflating whentlie screw-cap is adjusted at an intermediate position, the screw-cap being pro` vided with vents for the escape of air when both valves are unseated. While this means of escape is very desirable and effective for deflating, it has one disadvantage which I ovm'come by my present im roved device.

This disadvantage is that w en attaching the screw-ca to confine the air, the valvesf iermit a slig it loss of air, which loss cannot lie entirely avoided, although if the screwcap be screwed on promptlv and as rapidly as ossible the loss of air will not be apprecia le. Nevertheless, if the cap.be screwed on too slowly there may be an appreciable loss of air. My present improved device is adapted to reduce the loss of air to such a degree that it is negligible, even though the ca be screwed on slowly, the device nevertllicless being adated to ermit as rapid deflation as desire when a justed for defluting.

The present device embodies also an improved check valve which is adapted to be inserted ixito the valve body or casin from either end of the latter, the check va ve and asin having eoperative portions whereby the. c ieck vulve is retained und its accidental detachment prevented.

Qf the accompanying drawings I* igure 1 represents the. thumb und fiuvers of a and grasping the screw-cap, one o ilu. 55 fingers holding the main valve which is rarried by the ca in position to copernte immediat/ely wit i its seat so as to prevent the loss of air while the thumb and another finger rotate the cap to screw the cap on to the 50 valve body.

Fig. 2 represents, on a larger scale, the device included in Fig. 1, the screw-cap 'being shown in section and the valve in elevation.

Fig. 3 represents the valve body insec- 65 tion and the check valve in elevation, thc check valve being held upwardly against its seat as if by air pressure within the valve Fig. 4 re resents, on a still larger scale, a 70 Section inc uding a portion of the valve body and the lower end of the check valve seated therein, as shown by Fig. 3.

Fig. 5 represents a sectional view in which are combined the elements shown by Figs. 2 75' and 3, the screw-cap beingscrewed uponthe valve bod and the main valve which is carried by t e screw-ca being firmly seated against the valve bo y.

Fig. 6 represents an elevation of the check 80 valve shownby Figs. 3 and 5, in Fig. 6 the check valve being turned ninety degrees about its axis to show that the head at its upper end is narrow. f Fig. 7 represents a sectional view of tho 85 valve body.

Fig. 8 represents an elevation of a simplerforni of check valve which may be inserted onlv through the lower end of the valve bo y.

Fig. 9 represents a modified form of screwcap which is provided with a slidin sleeve adapted to cover and uncover the dflating vents.

Fig. 10 shows a. modified form of screw- 05 cap and valve, the cap being shown .in 4section and the valve in elevation, these two .parts having screw-threaded connection with each other.

The same reference characters indicate 10o the same arts whenever they occur.

The va ve body or casing is indicated at 10 in a well known form designed for pneumatic tires. It is provided with the usual external screw-thread 11 adapted to receive a. nut (not shown) for securing it in the rim of a wheel. Its upper end is reduced and provided with a screwthread 12 for coperation with a screw-cap indicated at 18 in Figs. 1,2 and 5, the screw-cap having an internal screw-thread 1-1 for engagin the screw-thread 12. An air asiugeway 15 ex tends through the valve dy 10. In this passagewa the valve body is rovided with a seat 16 or a -chec-k valve 1 and with a seat 18 for a valve 19 which is carried by the screw-ca 18. Whenthe screw-cap 1s detached an there is internal air pressure in the valve body the check valveis held a ainst the seat by such pressure; but when t e screw-ca is screwed on as far as it will o, to force t ie valve 10 against its seat 18, the ower end of the valve 19 engages the head 20 at the upper end yof the check valve and -depress'els the check valve from its seat; and

when the valve 19 is completely closed, as shown b Fi 5, to prevent the esca of air, the chec valve drops until its hea 20 rests upon a shoulder 21 in the airpassageway 15,

l as shown by Fig. 5.

The screw-'cap is provided with any dosiied. number of vents 2:2, for the purpose of deflating when the valves are adjusted for that purpose. These vents are formed in the side of the cap, in ,the screw-threaded 'portion thereof, so that they arcl covered by the reduced upper end o'f the valve body when the cap is screwed on as far as it willgo. Oneo'f my present improvements enaiilen nie. to place the valve 19 firnily against its seat before the threads l-l of the cap engage the threads 12 of the yalve body, and to hold the vulve 19 closed while screwing on the cap, whereby I ain able to unseat the check valve and scatthe .valve lll so quickly that no appreciable quantity of air can escape. This impiaiveiiient consists in providiii v the valve l() with u stem l extending lixiscly through tho top of the cap 13, and providing the upper-end of the stein with a head .4 whereby the valve iiiay be held depressed relatively to the cn p. Fig. 1 shows the cap being .held by the thumb and third finger of u hand. while the index finger is engaging the bead 24 to hohl the valve de )msi-aid below the lower edge of thoeap. Tie valve seat 18 is formed 'an high as possible in the valve body, so that it constitute the month of the piumaimway 15. Now, therefoie, if the cap begrasped and the valve be deprcssial an shown by Fig. l, the valve may be inserted into the mouth of the valve body and firmly seated againstiti-i seat 18 without causing the cap lil to engage the valve body. While the index finger in holding the valve seated. the thumb and third finger are free to rotate the cap to screw it on to the position shown by Fig.

5, the cap when in this position engaging a shoulder 25 iii the valve stem to keep the valve against its sent. It is now apparent that the insertion of the valve 19 is not dependent upon or retarded by the screw connection and that the manipulation of the valves and the screwing on of the cap may be effected by two wholly independent operations. The vents 22, during this operation, do not canse any loss of air. The'screwthreads 12 and l-L serve to seat the valve more tightlv aud- ,'hold it seated. That portion of the valve which engages the seatv 18 is preferably made of suitable soft material, such as rubber. in the forni of a collar, the valve stem 23 having a reduced neck 26 on which the collar is arranged, and the collar is held by confront-ing slioiilders at the ends of said neel'. The rubber collarmay, of course, be renewed as often as desired.

Now if the screw-cap bc u nscrewed only far enough to carry the vents 2'2 above the mouth of the valve body, the air n iay es\ cape through them. because atthis time the.

cap permits the valve 19 to open and prevents tlie check valve from closing` the check valve abutting against the lower end of the'valve 19" and the ca holding the valves by means of the shon der 2li.

Fig. t) shows a modified form of 'screw- `cap whereby the loss -of air may be otherwise prevented while screwing 'en the cap. l'u this form the valve 19* is provided with a stein 23* at the upper end of which is a head 24". The cap 13* is provided with a screw-thread 14* and with vents .2'2u which are for the saine purpose as the corresponding parts inthe of ier form. \The valve stein 23* does not extend through the crown .of the cap. but the head 24* is inclosed in the crown and confined therein b v a reduced throat 2l'. the valve being. iieverthe' lem, capable oflongitudiual movement relatively to the cap. so that the collar 19' may piu-rs up into the cap when the cap is attached to the valve bodv. As the valve cannot be iiiaiiipulnted iiidelwndeiitly of the cap. l have provided the cap willi a sliding sleeve 28 which is adapted 'to leave the venta uncovered when it. is raised, and which iii' adapted to cover the vents when de- ,preieaaL Near the upper end of the ,cap there in anfaiinular shoulder' 20 adapted to limit the upward movement of the sleeve. Between this shoulder and the reduced throat 2T. the diameter of the cap is alight] y less than the dinnietei' below the throat. and Ithe upper edge of the sleeve in turned inwardly to forni a flan an indicated at 80. This llaii is ada itei to engage the shoulder 29 wien the a eeve is raised and to en` from the cap. When attaching this cap to confine the air, the sleeve should be depressed so as to cover the vents, whereby it is adapted to prevent an appreciable loss of air which would otherwise occur when the two valves are o en. ,l

The c heck valve s iown b v Figs. 3, 5 and G may be inserted through either end of the valve body. The u )per end of the stem 82 which arrics the clieck valve is slotted as indicat at 33 whereby the two sides are adapted to be sprung toward each other to reduce lthe aggregate diameter of the head 20. The head is beveled as indicated at 34 so that it is ada ted to pass through the smaller portion o the nir passageway 15 between the valve seat 16 and the shoulder 21. If the check valve be inserted from the lower end of the valve body, when the head 20 has passed beyond the shoulder 21 its two arts will s )ring back to normal position as s iownl and *luis confine the check valve loosely in the valve. body. This o eration of inserting the check valve woul be desirable when assembling the parts at the factory. It 1s possible, however, to insert the check valve through the upper end of the valvebody. The valve member 17 (sec Fig. 4) is in the form of a ring, and it is preferably made of soft. elastic material, such as rullraelr. This ring is arranged between confro ing shoulders 35 and 30 formed on the valve stem, and occupies an annular cavity/fi? between these shoulders. If it should be desired to remove the check valve from the valve body, a suitable tool, s'uch as a pair of sharp-pointed incers, may be .inserted into the mouth of t 1e valve bodyand used to grasp the head 20 to draw the valve stem upwardly. This would require a much greater stress than the check valve would ever receive from the internal air pressure, and might result in destroying' the ring 17.k 1f the ring 17 should be destroyed, a new. ring could bc substituted for it and then the check valve could be easily replaced through the upper end of the valve body, because the cavity 437 provides suflicient space into which the" ring ma be compressed. The insertion of the c leek valve would be facilitated by wetting the ring and the-ud- 'acent portion of thc valve stein with saliva before inserting, and the ring would then slip easilv over the shoulder 21 which is bonded, thelioulder acting to compress the "ringiIQJhe-cavity 37 so tlat the ri ug would 'pawn- 'through the smaller diameter of the a'ly' passageway. t The ring would naturally Spaul to normal lmsltmn, as shown, after passing the sent 16, and the check valvcwould thereu|mn be loosely confined in"the.\. valve body as lmfore. The stein 32 is tapered, as indicated at 38, for the purpose of centering tbe check valve during lts closing movement.

Fig. 6 shows the check valve turned ninety degrees about its axis with reference to the posit-ion shown by Fi 3 and 5, in order to show that the thic ness of the head 2U is reduced. This reduction is made to provide a suflicient passageway for the air, and the passageway-1s amplified by the slot 33. In Fig. 8 I have shown a check valve 17X of frusto-conical formation, the same4 beimT formed integrally with the stem 32". With regard to the slot 83* and the head 20", this device.is the same as that shown by Figs. 3, 5 and 9, the only difference being` the mtegral formation of the valve -)orton 1T* and the frusto-conical sha )e o the same. This device, of course, would be made wholly of metal, preferably lbrass or similar composition, and obviously could only be inserted into the valve body from the lower end.

Fig. 10 shows a cap similar to that shown by Fig. 2, except that it has screw-threaded connection with the valve stein4 carried thereby. In this figure the cap is indicated at 13', and the rubber valve member is indi* cated at 19. The cap has an internal screwthread 14 for engaging the thread 12 of the valve body, and it is provided with vents 22.- The valve stem 23* is screw-threaded, and the ca is correspondingly scrmv-thread-A ed to enabA e the valve to be moved longitndi nally in consequence of rotative movement. The head 24 it the upper end of the valve stem is preferably knurled or otherwise formed to enable the fingers to obtain a ,firm grasp for rotatin or screwing the valve stem relatively to t e cap. This device is ln.

tended ,to be attached to the valve body as follower Withthe parts in the-position' shown by Fig. 10, the valve member 19*l is inserted into the mouth of t e valve body so that it enga s/its seat 18. When the yalve member is t us seated, Hielo-.ver edge of the ca is very slightly above the top'of'the va ve body; but the s ce between the cap and the valve body s so slight that the thread 14* will be br ught into coperatve engagement with the threa'd 12 by a single rotation of the capA such rotatio'n causing the cap to descent relativel to the valve because of the screw-three ed, connection between the valve stem and the.cap. By exerting a slight downward ressure while thus screwing the cap, the va ve member 19 will be held a inst its seat to prevent the loss of air wiile effecting screw-threaded connection between the ca and the valve body. The screw-threadc( connection between the valve stem 23 and the cap provides means whcrebythe valve may be adjusted relatively to the val .a body 10 inde- 'iendentl y of the adustmen of the cap. For example, when it is desired to deflate, the cap may be unscrewed ,far enough to uncover the vents 22. When the cap has been adjusted to the desired sition for deiating, the valve may be inc ependently adjusted by grasping` the head 24 and unscrewing the valve.

The ability of the valves 19, 19 and 19* to move up into their respective caps nalges it possible to form the seat 18 at the upper end of the valve body instead of at a considerable distance below the upper end. It is desirable to have the valve seat as near as possible to the upper end. The collars 19, 19x and 19 may be easily re laced because their respective stems enable t ein to move out of the cap. The.loose swivel connection between the valve stem and cap in each form permits universal movement of the rubber collar relatively to the cap and valve body, so that the valve is adapted to swing laterallyto compensate forY any eccentricity of the valve seat or of the cap which would be likely to occur.

I claim 1. An inflation valve having a casing, a check valve in said casing, and a cap for closing the month of said casing, said cap comprising a member adapted to engage said casing and having a part adapted to engage the' check valve to unseat it, said member and part being relatively movable in a 1ongitudinal difection, and said part extending through said member and 'being adapted to make a tight joint with said casing whereby said part may be manipulated from the ex terior to close the mouth of the casing and unseat said check valve and said member may be manipulated to engage said casing nml hold said part in its closed position.

2. A valve cap, forming a part indepcnch ent of a tire valve construction, said cap carrying a part adapted to tightly close the air-passage of a tire valve, said closing part being movable independently of said cap, having a manipulating` pali*l exterior of said cap, and having a part adapted to unseat a valve proper when said closing,r part is in closing position, and means for retaining said closing part in closing position.

3. A cap for tire valves, comprising a portion adapted to engage a valve casing, a portion carrying a packing adapted to close the end of the casing and a part for engaging a valve pin, and means for operating said last-named portion to press 1t toward or from the endvof, the casing, said means extending-to theexterior of the first-named portion.

In testimony whereof I have affixed my signature, in presence of two witnesses.

FEEDER-IK NIELSEN.

Witnesses:

WALTER P. ABELL, P. W. Pszzm'n. 

